While photographers might be attracted to a new format or different brand camera, the ownership and investment in legacy lenses of a specific mount may stop them from exploring new options for their image making. The SIGMA Mount Conversion Service offers the opportunity to change the mount on a specific set of SIGMA brand lenses, regardless of the mount, to Canon, Nikon, Sony, Pentax, Micro Four thirds and Sony E-mount. Pricing depends on the type and focal length of the original lens. Service details are handled by the local SIGMA representative or distributor within each country, worldwide, and takes from two to four weeks to complete.

The amazingly compact (2.8 x 3.4 inches) and affordable 18-200mm f/3.5-6.3 DC Macro OS HSM (27-300mm equivalent) lens is exclusively for APS-C sized sensors. It is smaller and lighter than the previous version and offers a closer focusing distance to boot. It also has a newly incorporated SLD glass element plus 3 aspheric elements among its 16 elements, 13 groups construction. The lens incorporates an optical stabilizer (OS) system for those cameras that do not have OS built-in, with automatic panning detection to shift the OS to one axis. It has a close focusing range of about 1.5 feet throughout the focal length range, making it extremely versatile for close-up photography.

Note: Sigma also received a "Best Design" award for its dp Quattro camera lineup.